Combinations

Combinations

Bekir Sahin Bekir Sahin

Bekir Sahin

AI Product Manager

发布日期: 2024年5月20日
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Given two integers n and k, return all possible combinations of k numbers chosen from the range [1, n].

You may return the answer in any order.

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Example 1:

Input: n = 4, k = 2

Output: [[1,2],[1,3],[1,4],[2,3],[2,4],[3,4]]

Explanation: There are 4 choose 2 = 6 total combinations. Note that combinations are unordered, i.e., [1,2] and [2,1] are considered to be the same combination.


Example 2:

Input: n = 1, k = 1

Output: [[1]]

Explanation: There is 1 choose 1 = 1 total combination.

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Constraints:

  • 1 <= n <= 20
  • 1 <= k <= n


SOLUTION 1:


SOLUTION 2:


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